Wire-web guide for paper-making machines.



No. 658,260. Patented Sept. l8, I900. T. HARVEY, 18.. WIRE WEB GUIDE FOR PAPER MAKING MACHINES.

(Application filed Nov. 27, 1899.; (No Model.) 2 Sheets$heet I.

.Ir a I No. 658,260. Patented Sept. I8, 1900.

T. HARVEY, 1n.

WIRE WEB GUIDE FOR PAPER MAKING MACHINES.

(Application filed Nov. 27, 1899'.v (No Model.) 2 Sheets-Sheet 2.

III'

THE "amps PEYEfiS cow. mow-undo" wumusmu. a. 04

machine.

UNITED STATES PATENT OFFICE.-

THOMAS HARVEY, JR, or HULL, CANADA.

WIRE-WEB GUIDE FOR PAPER-MAKING MACHINES.

SPECIFICATION forming part of Letters Patent No. 658,260, dated September 18, 1900.

Application filed November 27.1899.. Serial No. 738,397. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS HARVEY, Jr., a subject of the Queen of Great Britain, residing at Hull, in the county of Ottawa, in the Province of Quebec, Canada, have invented a newand useful Iinproveinentin Wire-\Veb Guides for Paper-Making Machines, of which the following is a specification.

My invention relates to improvements in wire-web guides for paper-making machines; and the object of the invention is to provide. a guiding mechanism for the wire web of a paper-machine which will be positive and instantaneous in its action, thereby preventing the wire web rubbing against What are known as the pans, which causes the edge of the wire to become frayed. My guide is so sensitive that immediately the wire touches the pan the guide-roll is moved so as to work the wire web over to the opposite side of the machine and away from the pan; and it consists, essentially, of the novel arrangement and construction of parts hereinafter described.

Figure 1 is a general perspective view of my guide connected to a papermachine. Fig. 2 is an enlarged perspective detail of my guide separated from the main body of the Fig. 3 is an enlarged detail of the sliding block and journal. Fig. 4. is an enlarged detail of the rock-arm for supporting the dogs. Fig. 5 is a detail of the spiral gear supported on the cross-shaft. Fig. 6 is an enlarged plan with the upper spiral gear and journal-box removed.

In the drawings like letters of reference indicate corresponding parts in each figure.

A is the main frame of the machine.

B and B are the couch-rolls, supported in the frame A in suitable bearings O and G.

D is the wire web, supported between the couch-rolls B and B.

E is the guide-roll, supported on a swivelbearing at its opposite end. This I do not show, as it is common to all machines using the old guides. r

F is a cross-stick supported beneath the wire Web D.

fare what are known as pans, held on the stick F by suitable cleats f.

G is a bracket secured to the main frame A for supporting the guide mechanism.

both to the arm h and to the stick F. The

stick'is similarly connected to the frame at the opposite end and is thereby capable of oscillating from side to side. b is a clip to which the link it is directly secured, so as to allow of its adjustment on the stickF.

I are guide-ribs, and J is a block having suitable channel-ways 3', supported on the ribs I.

K is a bearing having a downward projection k,which is held loosely within a socketj.

L is a spiral gear secured to the end of the guide-roll E.

Z is a shaft supported on suitable bearings Z and provided with a feather-key Z (See Figs. 5 and 6.) A

L is a spiral gear loosely supported on the shaft Z and between the lugs j of the slidable block J and held from a rotary movement by the feather-key Z M is a cross-shaft supported on suitable bearings m and provided with a threadwhich passes through the block J, and thus provides for the longitudinal adjustment of the same.

N is a double ratchet-Wheel supported on the shaft M. O is a rock-arm loosely supported on the shaft Mat 0. (See Fig. 4..) p are gravity-dogs designed to alternately engage with the ratchet N. P is a rocker similarly supported on the cross-shaft M to the outside of the ratchet-wheel N The arcshaped upper portion forms a guard for the ratchet-wheel N, keeping one of the dogs 19 normally out of gear.

The rock-arm O is oscillated by means of a crank Z connected by a link Z to the lower portion 0 of the rock-arm. The rock-arm P is connected by a stiff wire q to the stick F. To enable the wire to conform to the swaying movement of the stick and rock-arm, it is connected to the said rock-arm P by means of a split collar loosely supported on a pin q and having lugs g through which the eye at the end of the link passes. By this means the swing of the rock-arm and also of the stick is compensated for. I

Having described the parts involved in my invention, I shall briefly describe the operation of the same.

It will be understood that the wire Web of all paper-machines has a tendency to work over to one side or other of the machine through the couch-rolls becoming slightly out of true in their bearings. This tendency is compensated for by means of the guide-roll and the accompanying mechanism. As the wire web works over to the near side of the machine it comes in contact with the pan fon the stick F, carrying it sidewise by means of the pivot-link h. The rock-arm P, connected by the wire q to the stick F, is tilted, so as to carry the arc-shaped portion from beneath one of the dogs 13, thereby enabling it to engage with the ratchet-Wheel N and at the same time keeping the other from engagement. Through the guide-roll E and spiral gear L, sup ported thereon, and spiral gear L the shaft Z is rotated, and through it the crank P, which serves to rock the dog-supporting rocker O. The engaged dog 19 operates the wheel N, secured to the shaft M, and through the thread m moves the block J laterally, carrying with it this end of the guideroll E. The wire web now begins to move in the reverse direction until it comes in contact with the pan at the opposite end of the stick, when the reverse action takes place. From this description it will be seen that the work the wire web has to perform is reduced to a minimum, it only having to tilt the rocker P on the shaft. The remainder of the operation is performed by the guide-r011 E.

The guides hitherto used by not being instantaneous in action caused the wire web to be forced against the pan with considerable force either on one side ofthe machine or the other, and as the web revolves it is cut and frayed against the pan. This frayed edge has from time to time to be removed and in the course of about one to ten Weeks has to be renewed, as it becomes too narrow to support the paper. As these webs cost a large amount of money, it will be readily seen what a source of economy a perfectlyworking guide would be. My guide by working easily and instantaneously accomplishes this desired result. 7

What I claim as my invention is 1. In combination a guide-roll, a shiftable block supporting one end thereof, an oscillating stick, a supporting device for the same, mechanism for shifting the block, and means interposed between the stick and said mechanism for controlling the latter, said means being independent of the supporting device, substantially as described.

2. In a paper-making machine, the combination with the pivotally-supported guideroll, and cross-stick of a slidable journalblock, a shaft having a worm-thread suitably journaled in the frame of the machine and passing through the said sliding block, a ratchet-wheel secured to the end of said shaft, a dog-supporting rocker loosely supported on said shaft and provided with gravity-dogs reversely set and designed to mesh with said wheel one at a time, mechanism interposed between said rocker and guide-roll to oscillate said rocker and means for alternately throwing said dogs in and out of gear as and for the purpose specified.

3. In a paper-making machine, the combi nation with the pivotally-supported guideroll and stick, of a slidable journal-block provided with a screw-thread. a shaft having a worm-thread thereon passing through and meshing with the thread in said block, a ratchet-wheel secured to the end of said shaft, a dog-supporting rocker loosely supported on said shaft and provided with gravity-dogs set reversely and designed to mesh with said wheel, a cross-shaft provided with a feather connected to said rocker and designed to impart a rocking motion thereto, a spiral gear slidably supported on said shaft, lugs formed on said journal-box and surrounding said shaft on each side of said gear, a spiral gear located on the spindle of the guide-roll and meshing with said gear on the cross-shaft and means of throwing said dogs alternately in and out of gear as and for the purpose specified.

at. In a paper-making machine, the combination with the pivotal guide-roll, and stick, of a shaft having a worm-thread thereon, a journal block threaded on said worm, a ratchet-wheel secured to the end thereof, a dog-supporting rocker loosely journaled on said shaft and provided with gravity-dogs reversely set, a rocker also loosely supported on said shaft provided with an arc-shaped guard, a stiff wire connected to said rocker guard and cross-stick and means for trans mitting motion from the guidesroll to the said dog-supporting rocker as and for the purpose specified.

THOMAS HARVEY, JR.

Witnesses:

H. T. S. YOUNG, J. Hose. 

